Make GPU back-pressure work with remote CALayers

content/browser/compositor/browser_compositor_view_private_mac.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_COMPOSITOR_BROWSER_COMPOSITOR_VIEW_PRIVATE_MAC_H_
 #define CONTENT_BROWSER_COMPOSITOR_BROWSER_COMPOSITOR_VIEW_PRIVATE_MAC_H_
 
 #include <IOSurface/IOSurfaceAPI.h>
 
 #include "base/mac/scoped_nsobject.h"
@@ skipping 15 matching lines @@
       gfx::AcceleratedWidget widget);
 
   void SetClient(BrowserCompositorViewMacClient* client);
   void ResetClient();
 
   ui::Compositor* compositor() const { return compositor_.get(); }
 
   // Return true if the last frame swapped has a size in DIP of |dip_size|.
   bool HasFrameOfSize(const gfx::Size& dip_size) const;
 
+  // Return the CGL renderer ID for the surface, if one is available.
+  int GetRendererID() const;
+
   // Mark a bracket in which new frames are being pumped in a restricted nested
   // run loop.
   void BeginPumpingFrames();
   void EndPumpingFrames();
 
   void GotAcceleratedFrame(
       uint64 surface_handle, int output_surface_id,
       const std::vector<ui::LatencyInfo>& latency_info,
       gfx::Size pixel_size, float scale_factor);
 
@@ skipping 56 matching lines @@
   int accelerated_output_surface_id_;
   std::vector<ui::LatencyInfo> accelerated_latency_info_;
 
   // The size in DIP of the last swap received from |compositor_|.
   gfx::Size last_swap_size_dip_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_COMPOSITOR_BROWSER_COMPOSITOR_VIEW_PRIVATE_MAC_H_